Get off the couch and onto the Indoor Trainer. Out of all the trainers we tested, none of them compared to price and the quality of this trainer! Regardless of the weather outside you will be able to stay in shape. This indoor trainer converts your bike into an indoor cycling trainer. It utilizes a state of the art magnet system which provides magnetic resistance. These are perfect for the beginner or the professional who wants to stay in shape all year long! Now you can watch TV and ride your bike. Fit most 26" and 28" tyres.